Like I said, I don't hate LeBron, and he hasn't done shit this year to deserve any derision. He's playing the best ball of his career and has showed up in the playoffs.
The bottom line is that the way people view LeBron is extremely complex, and it's cumulative based on years of insanely intense media coverage. He brought it on himself with shit like the "Worldwide Icon" comment, but he didn't realize what he was getting himself into IMO--because he never took into account the possibility that he might not be the most successful player ever, and that the media adulation would mutate into constant criticism.
What pisses me off is that if OKC wins the chip, all the coverage will be about how LeBron choked and DIDN'T win it, rather than how OKC and Durant did.
To expand on what you're saying, alot of it also comes from the way he acted with the Cavs. Doing stupid dances, taking pictures, showing up opponents. A lot of this has been building for awhile and it just blew up with the Decision and that rally.